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Based on the semi-vector wave equation under cylindrical coordinate system, the mode distribution and complex propagation constant in bent waveguides were computed by a finite difference method with perfectly matched layer (PML) boundary condition.
中文意思:
摘要以柱坐标下的半矢量波动方程为基础,采用基于完美匹配层(PML)边界条件的有限差分方法,对弯曲波导进行模式求解,进而得到波导弯曲引起的辐射损耗。


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Based on the search for the biological and cultural resources around the world, the Western grand corporations acquire the intellectual property with the patent rights as its core, and export their commercial products to the developing countries. 摘要西方大公司在全球范围内搜寻包括生物资源与文化资源,并在此基础上取得以专利权为核心的知识产权,以此向发展中国家输出其商业化产品。
Based on the seasons and theory of the traditional Chinese medicine, proper amount of medicinal herbs are added into the spa water for improving the bather's health. 根据季节变化,依据中医整体观念,在温泉中加一定量的中药,能提高人体适应力。
Based on the security time limit theory, the calculation method for the consumption amount of the appointed time and some examples of reliability analysis were presented. 基于“安全期限理论”,提出了直升机使用期限消耗量的计算方法,并进行了实例的可靠性分析。
Based on the selection of the accelerating agents for the wet shotcrete, the applicability of the setting time for the accelerating agents got from the tests concerned are discussed herein, from which a proposal is put forward that the alkali-free acceler 摘要根据湿喷混凝土速凝剂品种选择试验结果,讨论了速凝剂凝结时间试验结果的适用性,开提出了永久工程湿喷混凝土应优先选用无碱速凝剂的建议。
Based on the semi-active control theory, a new type clearance viscous damper is presented in this paper. 摘要基于半主动控制理论,本文提出一种新型的间隙式粘滞阻尼器。
Based on the semi-vector wave equation under cylindrical coordinate system, the mode distribution and complex propagation constant in bent waveguides were computed by a finite difference method with perfectly matched layer (PML) boundary condition. 摘要以柱坐标下的半矢量波动方程为基础,采用基于完美匹配层(PML)边界条件的有限差分方法,对弯曲波导进行模式求解,进而得到波导弯曲引起的辐射损耗。
Based on the sequence forecast theory of grey system, a forecast model is established for the ground subsidence caused by exploitation in No. 1 Coal Mine of Xinfeng Coal Mining Bureau. 摘要根据灰色系统数列预测理论,建立了新峰一矿地表沉陷的灰色预测模型。
Based on the shear theory of Newtonian viscous liquid, the fusible damp coefficient is established for electromagnetism dynamic polymer Extruder screw's axial vibration system. 摘要对聚合物电磁动态塑化挤出机螺杆轴向振动系统,根据牛顿型粘性流体的剪切理论,确定了聚合物熔体的阻尼系统。
Based on the simple modelling calculation, the multiplicity and angular distribution of evaporated fragments from both projectile and target spectators in high energy nucleus-nucleus collisions are described. 摘要在高能核-核碰撞中,基于简单的模型计算,描述了来自弹核和靶核旁观体的蒸发碎片的多重数分布与角分布。
Based on the simplified payoff matrix, we find, the condition under the stronger learning ability and the upper Spillover, the firm can reduce its adoption cost since the technology innovation adoption is delayed, and the diffusion will take place. 结合简化后的支付矩阵对企业创新采用策略进行了分析,得出了在学习能力强、溢出度高的环境下,延迟采用策略可以减低企业的采用成本。
Based on the simplified structure of rock mass, FLAC(superscript 3D) numerical modeling technique is used to systematically analyze the distribution features of the secondary stress field, strain field and plastic zones in the surrounding rock mass of the 摘要在岩体结构模型概化的基础上,采用FLAC(上标3D)数值分析方法,系统研究了澜沧江某大型水电站大跨度、高边墙地下洞室群开挖完成后围岩的二次应力场、变形场和塑性破坏区的变化特征。
 
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